Those who have bought Apple products or used iPhones should pay attention to Apple’s statement that mobile networks (3G and 4G) use cellular networks.
Have you ever thought about where this name comes from?
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The signal of the mobile phone is transmitted in the air in the form of electromagnetic wave. When the mobile phone makes a call, it will convert the voice into a signal, and then send it to the nearest base station a in the form of electromagnetic wave. After receiving the signal, base station a transmits the signal to base station B covering the other party’s mobile phone signal through the switch. Base station B then sends the signal to the other party’s mobile phone, and the mobile phone receives the signal After that, the signal is converted into voice to realize the communication between the two sides.
Base stations can cover a larger area by honeycomb arrangement
Mobile phone signal is transmitted between different areas in the form of electromagnetic wave through the base station, but the transmission distance of electromagnetic wave is limited, and it gradually weakens with the increase of distance. Therefore, in order to make the signal coverage wide enough, it is necessary to set up a lot of base stations.
The distribution of base stations is not random. In order to save costs and maximize the use of resources, the distribution of base stations has been calculated precisely. We know that the signal coverage of the base station is circular. How to cover the whole area with the least circle in a certain area? That’s the answer!
There is a conclusion in mathematical calculation that when a circle with the same radius covers the plane, when the center of the circle is at the positive center of the surrounding hexagon, the number of circles used is the least. Therefore, the coverage of base stations is hexagonal distribution, and there is a base station in the center of each hexagon, which saves resources most. Because the formed network is covered together and looks like a cellular network, it is called cellular network.